Rolling-mill.



A. A. K. NOWAK ROLLING MILL.

APPLIOATION FILED MAR. 26. mm

Patented Jan. 2, 1912v 2 SHEETE1-sHEm 1 A. A. K. NOWLK, ROLLING MILL.

APPLIGATION FILED MAR. 26, 1910 Patented J an. 2, 1912.

- the-*aar. tiermairv, have invented a certain tion of the disk or carrier in which the beartrtfngal force imparted to the rolls thereby.

i sure of the shaping rolls than by the hammer blows of the rolls of the mill mentioned.

of the travel of each roll and rolls against the blank in a pret etermined rolls the strokes of which am determined ADOLF ALEXANDER KARL NOWAK. 0F BOUS-ON-THE SAAR. GERMANY.

ROLLING-MILL.

Specification of Letters latent.

lntentetlJn n. 2. 1912.

Application filed March 26, 1910. Serial N0v 551,714.

To all whomit may concern:

lie it known that l. Anon ALEXAXUEH KARL Nowak, a subject,of the Emperor of Austria-I-lungary, and residing at Boas-our new and useful improvement in Rolling- .\Iil| and I hereby .declare the fUllOWil'tg, to he a full. clear. and exact description of 1 the invent iont, r I

in rolling mills employ ng shaping rolls. it is now customary to use either cam shaped rolls, that is. the working face of each roll is eeeentrieto its axis,'or axially mounted rolls with annular working faces. These latter rolls are sometimes 5 mounted in sliding hearings so that the rota- 5 planetary l ings slide, is reinforced in effect by the cen- In mills OfsllllS type the stationary guides which limit the outward travel of the forming rolls are straight and lie parallel to the axis oftheblank so that the rollers held against this uide by centrifugal force, follow it througi the working portion of their travehand durin this travel smooth out the wales that are ormed when the roll'tirst strikes the blank. Mills of this character are more properly deemed hammering mills than rolling mi-lls, since the rolls strike the blank with a hammer stroke. The superiority of a true rollin mill over a mill of the metal of theblank is much more permanently overcome by the steady pres- T he resent apparatus comprises a rollin mil in which the planetary working ro is are circular and are mounted on their true axes in movable bearings in combination with guides arranger] to engage said axes or bearings during the working portion ress said ressure curve. The shaping of the blank is thus determined by the. curvature of the guide and not by blows imparted through y the centrifugal force imparted thereto.

Guides-for pressure rolls are admittedly old in reci rocating progressive rolling mills of the step by step type where roller 'roups are -mounted in a reciprocating rame. But obviousl these mills are of a distinct type, and 'urthertnore a special guide for each roller is provided. on which the roll r |'un.- hack and forward. lhis t vpe otmill is quite distinct from the prescut in which the rolls are planetary and ra h roll of the group is governed dur ng ll working travel by the common guide.

in the ar-crunpnnying drawings severalembodimcnts of the, invention are illustrated.

Figurel to 3 inclusive are vertical sections showing a roller group at diilercnt stages of its revolution; Fig. -l is a side elevation of the same showing the guides; Fig. .3 i a vertical section at right angles thereto: Figs. (1, T and R are side elevations'showing diflercnt methods of adjusting the guides: Fig. 1' is a diagrammatic side elevation of a modified form of the invention in which the rolls are mounted on chains; and Fig. it) is a similar view of another moditied arrangement in which but a single group of lUlls is employed.

'lnrning to the embodiment of my in vention shown in Figs. 1 to 5, this arrangement shows the shaping rollers 71 mounted on spindles extending between the flanges a of the carriers a. The spindles c are radiallv disphiceahle, and may be, as shown, held a ain t rotation by pins g on which they side. Springs g on the pins bear against the spindles and tend to force the latter radially inward. (imdew-ays (1 again t which the spindles c bear during the working travel oi the rollers. are located on the iniier face of tht frame a and may be made integral therewith. as shown in Fig. 5, This guideway' (I is of course shaped for the particular work in hand, and preferably in such manner that the. working roll during the first portion of its working travel (Fi s. l to 2) stretches the blank. on the mandrel if for example, and then (Figs. 2 to 3) smoothes it into shape. The guide (I is thus graded to cti'ect the desired action of the working roll. After the attack of each roll the blank is :ulvanced slightly together with the mandrel fand'is preferably rotated through an angle of 90, for instance by a handle f clamped on the mandrel f as shown in Fig. l. The blank and mandrel may be advanced at different speeds, if desired, so that the blank will either be drawn on or he pushed off of the mandrel. The

ample shown) to dili'erent thicknesses or in order that the same ide may be employed in shaping tubes of lfi'erent sizes, the guide may he made adjustable as shown for example in Figs. 6, 7 and 8. In Fi 0 one end of the guide is piv ted to the rame a and the other end counccted to the lever it, through the nut h on the end of which passes the screw it. In Fig. 7 the guide is shown provided with slots through which bolts ass by means-of which it may be secured in desired position. In Fig. 8 the working face ofthe guide is made removable so that any desired shape may be secured in position. This form has the further advantage that the working face is renewable 4 in case of wear, without replacing the entire guide. A ain this working face may be made of harer metal than may be necessary for the bodyof the guide.

Obviousl it is not essential that the working r0 lersbe supported in a carrier of the disk type shown in Figs. 1 to 5. Thus in Fig. 9 they are mounted u on a chain i )assing over driving chain w'eels a. As ong a section of the blank as desired may thus be subjected to the working of the rolls and the pressure guide d is correspondingly lengthened Two series of oppositely faced rol s' are li ewise unnecessary, since the one ma be replaced by a. stationary form A:

(Fig. 10) with which the rolls 6 cooperate.

I claimi 1. A rolling mill having a. group of displaceableshaping rolls and a rotary carrier aving bearings therefor, in combination with a common roll guidecai'ried directly by the frame and arranged between the axis of said carrier and the roll bearings so as to come into effective engagement with said rolls consecutive] during the workin travel of each rol and force it outwar substantially as described.

2. A rolling mill haviii a group of dislplaeeable shapingrolls and a rotary carrier aving bearings therefor, in combination with a common adjustablq roll guide carried directly by the frame and arranged between the axis of said carrier and the roll bearings so as to come into effective engagement with said rolls consecutively during the working travel of each roll and force it outward, substantial] as described.

3. A rolling mill having a group of displaceable shaping rolls and a rotary carrier having bearings therefor, in combination with a common adjustable roll guide can ried directly by the frame and arranged between the axis of said carrier and the roll bearings so as to come into effective engagement with said rolls consecutive] during the working travel of each roll an force It outward, a lever connected to the guide, a nut on the end of the lever and a screw, which passes through the nut, substantially as described.

4. A rolling mill havin a group of displaceable shaping rolls an a rotary carrier having bearings therefor, in combination with a common roll guide carried directly by the frame and arranged between the axis of said carrier and the roll bearings so as to come into efiective engagement with said rolls consecutively during the workin travel of each roll and force it outward an means in connection with said ide for altering the workin travel of sai rolls.

5. A rolling inilfi'lavin a group of dieplaccablc shapin rolls an a rotary carrier therefor in com ination with a common roll guide mounted directly on the frame between the roll bearings and the axis of the carrier, and bearin on said rolls adapted to engage said gui a during their working travel, substantially' as described.-

(i rolling mill having a group of displaccable shapin rolls an a rotary carrier therefor in com ination with a common guide' for said rolls arranged between the latter and the axis of the carrier, and bearing's on said rolls adapted qengage said 

